161-568: The South African Open is one of the oldest national open golf championships in the world, having first been played in 1903, and is one of the principal tournaments on the Southern-Africa-based Sunshine Tour . Since 1997 it has also been co-sanctioned by the European Tour . The first formal event was organised in 1903, following a series of exhibition matches that had been held over the preceding ten years. The championship
322-530: A mammal adapted to desert life. It minimizes its water loss by producing concentrated urine and dry dung , and is able to lose 40% of its body weight through water loss without dying of dehydration. Carnivores can obtain much of their water needs from the body fluids of their prey. Many other hot desert animals are nocturnal , seeking out shade during the day or dwelling underground in burrows. At depths of more than 50 cm (20 in), these remain at between 30 and 32 °C (86 and 90 °F) regardless of
483-455: A mosaic of smooth stones, often forming desert pavements , and little further erosion takes place. Other desert features include rock outcrops , exposed bedrock and clays once deposited by flowing water. Temporary lakes may form and salt pans may be left when waters evaporate. There may be underground sources of water, in the form of springs and seepages from aquifers . Where these are found, oases can occur. Plants and animals living in
644-456: A sand blasting mechanism which grinds away solid objects in its path as the kinetic energy of the wind is transferred to the ground. The sand eventually ends up deposited in level areas known as sand-fields or sand-seas, or piled up in dunes. Many people think of deserts as consisting of extensive areas of billowing sand dunes because that is the way they are often depicted on TV and in films, but deserts do not always look like this. Across
805-428: A semi-arid climate and are less extreme than regular deserts. Like arid deserts, temperatures can vary greatly in semi deserts. They share some characteristics of a true desert and are usually located at the edge of deserts and continental dry areas. They usually receive precipitation from 250 to 500 mm (9.8 to 19.7 in) but this can vary due to evapotranspiration and soil nutrition. Semi-deserts can be found in
966-435: A "bogey golfer" (handicap around 20) would be expected to play than a "scratch golfer" relative to their handicap. The goal is to play as few strokes per round as possible. A golfer's number of strokes in a hole, course, or tournament is compared to its respective par score, and is then reported either as the number that the golfer was "under-" or "over-par", or if it was "equal to par". A hole in one (or an "ace") occurs when
1127-421: A backpack, and often bags have retractable legs that allow the bag to stand upright when at rest. The golf swing is outwardly similar to many other motions involving swinging a tool or playing implement, such as an axe or a baseball bat. However, unlike many of these motions, the result of the swing is highly dependent on several sub-motions being properly aligned and timed. These ensure that the club travels up to
1288-415: A ball that has stopped on it; "doglegs", which are changes in the direction of the fairway that often require shorter shots to play around them; bunkers (or sand traps); and water hazards such as ponds or streams. In stroke play competitions each player plays their ball until it is holed no matter how many strokes that may take. In match play it is acceptable to simply pick up one's ball and "surrender
1449-536: A complete round; with most holes having a par of 4, and a smaller number of par-3 and par-5 holes. Additionally, courses may be classified according to their play difficulty, which may be used to calculate a golfer's handicap . The two primary difficulty ratings in the U.S. are the Course Rating, which is the expected score for a zero-handicap "scratch golfer", and the Slope Rating, which is a measure of how much worse
1610-438: A desert conglomerate . In time, bacteria that live on the surface of the stones accumulate a film of minerals and clay particles, forming a shiny brown coating known as desert varnish . Other non-sandy deserts consist of exposed outcrops of bedrock , dry soils or aridisols , and a variety of landforms affected by flowing water , such as alluvial fans , sinks or playas , temporary or permanent lakes , and oases. A hamada
1771-505: A destructive effect on the exposed rocky surfaces. The repeated fluctuations put a strain on exposed rock and the flanks of mountains crack and shatter. Fragmented strata slide down into the valleys where they continue to break into pieces due to the relentless sun by day and chill by night. Successive strata are exposed to further weathering. The relief of the internal pressure that has built up in rocks that have been underground for aeons can cause them to shatter. Exfoliation also occurs when
SECTION 10
#17330944587041932-493: A full 18. In sudden death, a player who scores lower on a hole than all of their opponents wins the match. If at least two players remain tied after such a playoff using a pre-determined number of holes, then play continues in sudden death format, where the first player to win a hole wins the tournament. Desert A desert is a landscape where little precipitation occurs and, consequently, living conditions create unique biomes and ecosystems. The lack of vegetation exposes
2093-420: A golf course, and which club is used to accomplish the shot, are always completely at the discretion of the golfer; in other words, there is no restriction whatsoever on which club a golfer may or may not use at any time for any shot. Golf balls are spherical, usually white (although other colours are allowed), and minutely pock-marked by dimples that decrease aerodynamic drag by increasing air turbulence around
2254-410: A golfer sinks their ball into the cup with their first stroke from the tee. Common scores for a hole also have specific terms. In a typical professional tournament or among "scratch" amateur players, "birdie-bogey" play is common; a player will "lose" a stroke by bogeying a hole, then "gain" one by scoring a birdie. Eagles are uncommon but not rare; however, only 18 players have scored an albatross in
2415-453: A great deal of difference in how well the ball is hit and how straight it travels. The general goal of a player making a full swing is to propel the clubhead as fast as possible while maintaining a single "plane" of motion of the club and clubhead, to send the clubhead into the ball along the desired path of travel and with the clubhead also pointing that direction. Accuracy and consistency are typically stressed over pure distance. A player with
2576-439: A higher degree of loft and a comparatively shorter distance. The actual physical length of each club is longer or shorter, depending on the distance the club is intended to propel the ball. Golf clubs have traditionally been arranged into three basic types. Woods are large-headed, long-shafted clubs meant to propel the ball a long distance from relatively "open" lies, such as the teeing ground and fairway. Of particular importance
2737-453: A higher launch angle and a more forgiving nature. A maximum of 14 clubs is allowed in a player's bag at one time during a stipulated round. The choice of clubs is at the golfer's discretion, although every club must be constructed in accordance with parameters outlined in the rules. (Clubs that meet these parameters are usually called "conforming".) Violation of these rules can result in disqualification. The exact shot hit at any given time on
2898-415: A low basal metabolic rate and by remaining underground during the heat of the day, reducing loss of water through its skin and respiratory system when at rest. Herbivorous mammals obtain moisture from the plants they eat. Species such as the addax antelope , dik-dik , Grant's gazelle and oryx are so efficient at doing this that they apparently never need to drink. The camel is a superb example of
3059-406: A men's major championship. One of the rarest feats in golf is the condor, which has never occurred in a professional tournament. Only five condors have been verified to have ever occurred, although none of the courses involved were professionally accredited. There are two basic forms of golf play, match play and stroke play. Stroke play is more popular. Two players (or two teams) play each hole as
3220-409: A metal head primarily consisting of a flat, angled striking face. Traditionally the clubhead was forged from iron; modern iron clubheads are investment-cast from a steel alloy. Irons of varying loft are used for a variety of shots from virtually anywhere on the course, but most often for shorter-distance shots approaching the green, or to get the ball out of tricky lies such as sand traps. The third class
3381-484: A number of ways, generally combining total precipitation, number of days on which this falls, temperature, and humidity, and sometimes additional factors. For example, Phoenix, Arizona , receives less than 250 mm (9.8 in) of precipitation per year, and is immediately recognized as being located in a desert because of its aridity-adapted plants. The North Slope of Alaska's Brooks Range also receives less than 250 mm (9.8 in) of precipitation per year and
SECTION 20
#17330944587043542-483: A player's obligation to contribute to the care of the course. Though there are no penalties for breach of etiquette rules, players generally follow the rules of golf etiquette in an effort to improve everyone's playing experience. Penalty strokes are incurred in certain situations and are counted towards a player's score as if there were extra swing(s) at the ball. Either one or two strokes are added for most rule infractions or for taking relief from various situations, with
3703-513: A round. At some courses, gas or electric golf carts are used to travel between shots, which can speed-up play and allows participation by individuals unable to walk a whole round. On other courses players generally walk the course, either carrying their bag using a shoulder strap or using a "golf trolley" for their bag. These trolleys may or may not be battery assisted. At many amateur tournaments including U.S. high school and college play, players are required to walk and to carry their own bags, but at
3864-400: A separate contest against each other in what is called match play . The party with the lower score wins that hole, or if the scores of both players or teams are equal the hole is "halved" (or tied). The game is won by the party that wins more holes than the other. In the case that one team or player has taken a lead that cannot be overcome in the number of holes remaining to be played, the match
4025-423: A series of long, linear dunes known as seif dunes may form. These also occur parallel to a strong wind that blows in one general direction. Transverse dunes run at a right angle to the prevailing wind direction. Star dunes are formed by variable winds, and have several ridges and slip faces radiating from a central point. They tend to grow vertically; they can reach a height of 500 m (1,600 ft), making them
4186-459: A site of pilgrimage. In 1764, the standard 18-hole golf course was created at St Andrews when members modified the course from 22 to 18 holes. Golf is documented as being played on Musselburgh Links , East Lothian, Scotland as early as 2 March 1672, which is certified as the oldest golf course in the world by Guinness World Records . The oldest surviving rules of golf were compiled in March 1744 for
4347-461: A sparse trophic network . Plant growth is limited by rainfall , temperature extremes and desiccating winds. Deserts have strong temporal variability in the availability of resources due to the total amount of annual rainfall and the size of individual rainfall events. Resources are often ephemeral or episodic, and this triggers sporadic animal movements and 'pulse and reserve' or 'boom-bust' ecosystem dynamics. Erosion and sedimentation are high due to
4508-419: A standardized playing area, and coping with the varied terrains encountered on different courses is a key part of the game. Courses typically have either 9 or 18 holes , regions of terrain that each contain a cup , the hole that receives the ball. Each hole on a course has a teeing ground for the hole's first stroke, and a putting green containing the cup. There are several standard forms of terrain between
4669-439: A steady wind begins to blow, fine particles lying on the exposed ground begin to vibrate. At greater wind speeds, some particles are lifted into the air stream. When they land, they strike other particles which may be jerked into the air in their turn, starting a chain reaction . Once ejected, these particles move in one of three possible ways, depending on their size, shape and density; suspension , saltation or creep. Suspension
4830-571: A storm that may be many kilometers away. Most deserts are in basins with no drainage to the sea but some are crossed by exotic rivers sourced in mountain ranges or other high rainfall areas beyond their borders. The River Nile , the Colorado River and the Yellow River do this, losing much of their water through evaporation as they pass through the desert and raising groundwater levels nearby. There may also be underground sources of water in deserts in
4991-469: A straight drive that travels only 220 yards (200 m) will nevertheless be able to accurately place the ball into a favourable lie on the fairway, and can make up for the lesser distance of any given club by simply using "more club" (a lower loft) on their tee shot or on subsequent fairway and approach shots. However, a golfer with a drive that may go 280 yards (260 m) but often does not fly straight will be less able to position their ball advantageously;
South African Open (golf) - Misplaced Pages Continue
5152-452: A stroke; it is fundamentally important in being able to play a stroke effectively. The stance adopted is determined by what stroke is being played. All stances involve a slight crouch. This allows for a more efficient striking posture whilst also isometrically preloading the muscles of the legs and core; this allows the stroke to be played more dynamically and with a greater level of overall control. When adopting their stance golfers start with
5313-485: A tolerable level. In many ways, birds are the ablest to do this of the higher animals. They can move to areas of greater food availability as the desert blooms after local rainfall and can fly to faraway waterholes. In hot deserts, gliding birds can remove themselves from the over-heated desert floor by using thermals to soar in the cooler air at great heights. In order to conserve energy, other desert birds run rather than fly. The cream-colored courser flits gracefully across
5474-632: A type of cold desert . While they do not lack water, having a persistent cover of snow and ice, this is merely due to marginal evaporation rates and low precipitation. The McMurdo dry valleys of Antarctica, which lack water (whether rain, ice, or snow) much like a non-polar desert and even have such desert features as hypersaline lakes and intermittent streams that resemble (except for being frozen at their surfaces) hot or cold deserts for extreme aridity and lack of precipitation of any kind. Extreme winds and not seasonal heat desiccate these nearly-lifeless terrains. The concept of "biological desert" redefines
5635-479: A typical par-3 hole is less than 250 yards (230 m) in length, with a par-4 hole ranging between 251–450 yards (230–411 m), and a par-5 hole being longer than 450 yards (410 m); for women these boundaries are lower, and for professionals they are much increased. The rare par-6s can stretch well over 650 yards (590 m). These distances are based on the typical scratch golfer's drive distance of between 240 and 280 yards (220 and 260 m). Although length
5796-400: A year; they have no annual seasonal cycle of precipitation and experience twelve-month periods with no rainfall at all. Arid deserts receive between 25 and 200 mm (1 and 8 in) in a year and semiarid deserts between 200 and 500 mm (8 and 20 in). However, such factors as the temperature, humidity, rate of evaporation and evapotranspiration, and the moisture storage capacity of
5957-465: Is 150 km (93 mi) long and is the largest oasis in the Libyan Desert. A lake occupied this depression in ancient times and thick deposits of sandy-clay resulted. Wells are dug to extract water from the porous sandstone that lies underneath. Seepages may occur in the walls of canyons and pools may survive in deep shade near the dried up watercourse below. Lakes may form in basins where there
6118-525: Is a jumble of eroded sandstone outcrops , canyons , blocks, pinnacles , fissures , slabs and ravines . In some places the wind has carved holes or arches, and in others, it has created mushroom-like pillars narrower at the base than the top. On the Colorado Plateau , it is water that has been the prevailing eroding force. Here, rivers, such as the Colorado , have cut their way over the millennia through
6279-532: Is a type of desert landscape consisting of a high rocky plateau where the sand has been removed by aeolian processes . Other landforms include plains largely covered by gravels and angular boulders, from which the finer particles have been stripped by the wind. These are called "reg" in the western Sahara, "serir" in the eastern Sahara, "gibber plains" in Australia and "saï" in central Asia. The Tassili Plateau in Algeria
6440-426: Is about two hours for a 9-hole round and four hours for an 18-hole round. Playing a hole on a golf course is initiated by putting a ball into play by striking it with a club on the teeing ground (also called the tee box, or simply the tee). For this first shot on each hole, it is allowed but not required for the golfer to place the ball on a tee prior to striking it. A tee is a small peg that can be used to elevate
6601-623: Is continuous above 5,600 m (18,400 ft). Nevertheless, there is some plant life in the Atacama, in the form of specialist plants that obtain moisture from dew and the fogs that blow in from the Pacific. When rain falls in deserts, as it occasionally does, it is often with great violence. The desert surface is evidence of this with dry stream channels known as arroyos or wadis meandering across its surface. These can experience flash floods , becoming raging torrents with surprising rapidity after
South African Open (golf) - Misplaced Pages Continue
6762-412: Is deemed to be won by the party in the lead, and the remainder of the holes are not played. For example, if one party already has a lead of six holes, and only five holes remain to be played on the course, the match is over and the winning party is deemed to have won "6 & 5". At any given point, if the lead is equal to the number of holes remaining, the party leading the match is said to be "dormie", and
6923-479: Is higher than that of forests or the sea. A desert is a region of land that is very dry because it receives low amounts of precipitation (usually in the form of rain, but it may be snow, mist or fog), often has little coverage by plants, and in which streams dry up unless they are supplied by water from outside the area. Deserts generally receive less than 250 mm (10 in) of precipitation each year. The potential evapotranspiration may be large but (in
7084-424: Is known as "conventional". There are many variations of conventional including overlap, where the golfer overlaps the off hand index finger onto off the dominant pinky; interlock, where the offhand index finger interlocks with the dominant pinky and ring finger; double or triple overlap and so on. Recently, "cross handed" putting has become a popular trend amongst professional golfers and amateurs. Cross handed putting
7245-516: Is not considered an amateur and may not participate in competitions limited solely to amateurs. However, amateur golfers may receive expenses that comply with strict guidelines and they may accept non-cash prizes within the limits established by the Rules of Amateur Status. In addition to the officially printed rules, golfers also abide by a set of guidelines called golf etiquette . Etiquette guidelines cover matters such as safety, fairness, pace of play, and
7406-551: Is often classified as a cold desert. Other regions of the world have cold deserts, including areas of the Himalayas and other high-altitude areas in other parts of the world. Polar deserts cover much of the ice-free areas of the Arctic and Antarctic. A non-technical definition is that deserts are those parts of Earth's surface that have insufficient vegetation cover to support a human population. Potential evapotranspiration supplements
7567-434: Is often less than 40 mm or 1.5 in) to being very far from the nearest available sources of moisture and are often in the lee of mountain ranges. Montane deserts are normally cold, or may be scorchingly hot by day and very cold by night as is true of the northeastern slopes of Mount Kilimanjaro . Polar deserts such as McMurdo Dry Valleys remain ice-free because of the dry katabatic winds that flow downhill from
7728-421: Is only possible for particles less than 0.1 mm (0.0039 in) in diameter. In a dust storm, these fine particles are lifted up and wafted aloft to heights of up to 6 km (3.7 mi). They reduce visibility and can remain in the atmosphere for days on end, conveyed by the trade winds for distances of up to 6,000 km (3,700 mi). Denser clouds of dust can be formed in stronger winds, moving across
7889-513: Is played for the lowest number of strokes by an individual, known as stroke play , or the lowest score on the most individual holes in a complete round by an individual or team, known as match play . Stroke play is the most commonly seen format at all levels, especially at the elite level. The modern game of golf originated in 15th century Scotland . The 18-hole round was created at the Old Course at St Andrews in 1764. Golf's first major , and
8050-441: Is still there today. Every round of golf is based on playing a number of holes in a given order. A "round" typically consists of 18 holes that are played in the order determined by the course layout. Each hole is played once in the round on a standard course of 18 holes. The game can be played by any number of people, although a typical group will have 1–4 people playing the round. The typical amount of time required for pace of play
8211-486: Is sufficient precipitation or meltwater from glaciers above. They are usually shallow and saline, and wind blowing over their surface can cause stress, moving the water over nearby low-lying areas. When the lakes dry up, they leave a crust or hardpan behind. This area of deposited clay, silt or sand is known as a playa . The deserts of North America have more than one hundred playas, many of them relics of Lake Bonneville which covered parts of Utah, Nevada and Idaho during
SECTION 50
#17330944587048372-657: Is the Atacama Desert . It is virtually devoid of life because it is blocked from receiving precipitation by the Andes mountains to the east and the Chilean Coast Range to the west. The cold Humboldt Current and the anticyclone of the Pacific are essential to keep the dry climate of the Atacama. The average precipitation in the Chilean region of Antofagasta is just 1 mm (0.039 in) per year. Some weather stations in
8533-444: Is the driver or "1-wood", which is the lowest lofted wood club, and in modern times has become highly specialized for making extremely long-distance tee shots, up to 300 yards (270 m), or more, in a professional golfer's hands. Traditionally these clubs had heads made of a hardwood, hence the name, but virtually all modern woods are now made of metal such as titanium, or of composite materials. Irons are shorter-shafted clubs with
8694-407: Is the putter , which evolved from the irons to create a low-lofted, balanced club designed to roll the ball along the green and into the hole. Putters are virtually always used on the green or in the surrounding rough/fringe. A fourth class, called hybrids , evolved as a cross between woods and irons, and are typically seen replacing the low-lofted irons with a club that provides similar distance, but
8855-439: Is the idea that the dominant hand is on top of the grip where the weak hand is on the bottom. This grip restricts the motion in your dominant hand and eliminates the possibility of wrist breakdowns through the putting stroke. Other notable putting styles include "the claw", a style that has the grip directly in between the thumb and index finger of the dominant hand while the palm faces the target. The weak hand placed normally on
9016-450: Is the key to plant growth. It can only take place during the day as energy from the sun is required, but during the day, many deserts become very hot. Opening stomata to allow in the carbon dioxide necessary for the process causes evapotranspiration , and conservation of water is a top priority for desert vegetation. Some plants have resolved this problem by adopting crassulacean acid metabolism , allowing them to open their stomata during
9177-450: Is the primary factor in calculating par, other factors are taken into account; however the number of strokes a scratch golfer should take to make the green remains foremost. Factors affecting the calculation include altitude, gradient of the land from the tee to green, and forced " lay-ups " due to dog-legs (sharp bends) or obstacles (e.g. bunkers, water hazards). Getting the ball onto the green in two strokes less than par, and hence meeting
9338-431: Is the specializations of mammalian kidneys shown by desert-inhabiting species. Many examples of convergent evolution have been identified in desert organisms, including between cacti and Euphorbia , kangaroo rats and jerboas , Phrynosoma and Moloch lizards. Deserts present a very challenging environment for animals. Not only do they require food and water but they also need to keep their body temperature at
9499-407: Is typically positioned more to the "front" of the player's stance (closer to the leading foot) for lower-lofted clubs, with the usual ball position for a drive being just behind the arch of the leading foot. The ball is placed further "back" in the player's stance (toward the trailing foot) as the loft of the club to be used increases. Most iron shots and putts are made with the ball roughly centered in
9660-406: Is used to transport golf clubs and the player's other or personal equipment. Golf bags have several pockets designed for carrying equipment and supplies such as tees, balls, and gloves. Golf bags can be carried, pulled on a trolley or harnessed to a motorized golf cart during play. Golf bags usually have both a hand strap and shoulder strap for carrying, others may be carried over both shoulders like
9821-528: Is very cold and carries little moisture so little precipitation occurs and what does fall, usually snow, is carried along in the often strong wind and may form blizzards, drifts and dunes similar to those caused by dust and sand in other desert regions. In Antarctica , for example, the annual precipitation is about 50 mm (2 in) on the central plateau and some ten times that amount on some major peninsulas. Based on precipitation alone, hyperarid deserts receive less than 25 mm (1 in) of rainfall
SECTION 60
#17330944587049982-669: The Atacama Desert . Deserts of this type are often long and narrow and bounded to the east by mountain ranges. They occur in Namibia , Chile , southern California and Baja California . Other coastal deserts influenced by cold currents are found in Western Australia , the Arabian Peninsula and Horn of Africa , and the western fringes of the Sahara. In 1961, Peveril Meigs divided desert regions on Earth into three categories according to
10143-665: The United States Golf Association (USGA). With the aim of simplifying the rules, in 2017 the USGA and R&A undertook a complete rewrite. The new rule book came into effect in January 2019. The underlying principle of the rules is fairness. As stated on the back cover of the official rule book: There are strict regulations regarding the amateur status of golfers. Essentially, anybody who has ever received payment or compensation for giving instruction, or played golf for money,
10304-616: The horse latitudes at 30° to 35° North and South. These belts are associated with the subtropical anticyclone and the large-scale descent of dry air. The Sahara Desert is of this type. Mid-latitude deserts occur between 30° and 50° North and South. They are mostly in areas remote from the sea where most of the moisture has already precipitated from the prevailing winds. They include the Tengger and Sonoran Deserts . Monsoon deserts are similar. They occur in regions where large temperature differences occur between sea and land. Moist warm air rises over
10465-414: The rocks , which consequently break in pieces. Although rain seldom occurs in deserts, there are occasional downpours that can result in flash floods. Rain falling on hot rocks can cause them to shatter, and the resulting fragments and rubble strewn over the desert floor are further eroded by the wind. This picks up particles of sand and dust, which can remain airborne for extended periods – sometimes causing
10626-417: The windward slope of the mountain range . When they descend on the leeward side, they warm and their capacity to hold moisture increases so an area with relatively little precipitation occurs. The Taklamakan Desert is an example, lying in the rain shadow of the Himalayas and receiving less than 38 mm (1.5 in) precipitation annually. Other areas are arid by virtue of being a very long way from
10787-410: The "general penalty" defined as two-strokes, and disqualification for severe or repeated rule breaches. Examples include: Golf clubs are used to hit a golf ball . Each club is composed of a shaft with a lance (or "grip") on the top end and a club head on the bottom. Long clubs, which have a lower amount of degree loft, are those meant to propel the ball a comparatively longer distance, and short clubs
10948-486: The Atacama have never received rain. Evidence suggests that the Atacama may not have had any significant rainfall from 1570 to 1971. It is so arid that mountains that reach as high as 6,885 m (22,589 ft) are completely free of glaciers and, in the southern part from 25°S to 27°S, may have been glacier-free throughout the Quaternary , though permafrost extends down to an altitude of 4,400 m (14,400 ft) and
11109-570: The Company of Gentlemen Golfers, later renamed The Honourable Company of Edinburgh Golfers , which was played at Leith , Scotland. The world's oldest golf tournament in existence, and golf's first major, is The Open Championship , which was first played on 17 October 1860 at Prestwick Golf Club, in Ayrshire, Scotland, with Scottish golfers winning the earliest majors . Two Scotsmen from Dunfermline , John Reid and Robert Lockhart, first demonstrated golf in
11270-616: The Scots language and the Old English word hlinc ("rising ground, ridge"): traditionally these are coastal sand dunes but sometimes open parkland. This gave rise to the term "golf links", particularly applied to seaside courses and those built on naturally sandy soil inland. The first 18-hole golf course in the United States was on a sheep farm in Downers Grove, Illinois , in 1892. The course
11431-456: The U.S. by setting up a hole in an orchard in 1888, with Reid setting up America's first golf club the same year, Saint Andrew's Golf Club in Yonkers, New York. A golf course consists of either 9 or 18 holes, each with a teeing ground or "tee box" that is set off by two markers showing the bounds of the legal tee area, fairway , rough and other hazards , and the putting green surrounded by
11592-517: The absence of available water) the actual evapotranspiration may be close to zero. Semi-deserts are regions which receive between 250 and 500 mm (10 and 20 in) and when clad in grass, these are known as steppes . Most deserts on Earth such as the Sahara Desert , Grand Australian Desert and the Great Basin Desert , occur in low altitudes . One of the driest places on Earth
11753-401: The air but soon fall back to earth, ejecting other particles in the process. Their weight prevents them from being airborne for long and most only travel a distance of a few meters (yards). The sand streams along above the surface of the ground like a fluid, often rising to heights of about 30 cm (12 in). In a really severe steady blow, 2 m (6 ft 7 in) is about as high as
11914-722: The amount of precipitation they received. In this now widely accepted system, extremely arid lands have at least twelve consecutive months without precipitation, arid lands have less than 250 mm (9.8 in) of annual precipitation, and semiarid lands have a mean annual precipitation of between 250 and 500 mm (9.8 and 19.7 in). Both extremely arid and arid lands are considered to be deserts while semiarid lands are generally referred to as steppes when they are grasslands. Deserts are also classified, according to their geographical location and dominant weather pattern, as trade wind, mid-latitude, rain shadow, coastal, monsoon, or polar deserts . Trade wind deserts occur either side of
12075-432: The balance in muscles. Putting is considered to be the most important component of the game of golf. As the game of golf has evolved, there have been many different putting techniques and grips that have been devised to give golfers the best chance to make putts. When the game originated, golfers would putt with their dominant hand on the bottom of the grip and their weak hand on top of the grip. This grip and putting style
12236-442: The ball by taking their stance to the side of it and (except when the ball lies in a hazard) grounding the club behind the ball. The golfer then takes their backswing, rotating the club, their arms and their upper body away from the ball, and then begins their swing, bringing the clubhead back down and around to hit the ball. A proper golf swing is a complex combination of motions, and slight variations in posture or positioning can make
12397-590: The ball comes to rest, the golfer strikes it again as many times as necessary using shots that are variously known as a "lay-up", an "approach", a "pitch", or a " chip ", until the ball reaches the green, where the golfer then " putts " the ball into the hole (commonly called "sinking the putt" or "holing out"). The goal of getting the ball into the hole ("holing" the ball) in as few strokes as possible may be impeded by obstacles such as areas of longer grass called "rough" (usually found alongside fairways), which both slows any ball that contacts it and makes it harder to advance
12558-425: The ball in line with the desired path; that the clubface is in line with the swing path; and that the ball hits the centre or "sweet spot" of the clubface. The ability to do this consistently, across a complete set of clubs with a wide range of shaft lengths and clubface areas, is a key skill for any golfer, and takes a significant effort to achieve. Stance refers to how the golfer positions themselves in order to play
12719-559: The ball in motion, which delays "boundary layer" separation and reduces the drag-inducing "wake" behind the ball, thereby allowing the ball to fly farther. The combination of a soft "boundary layer" and a hard "core" enables both distance and spin. A tee is allowed only for the first stroke on each hole, unless the player must hit a provisional tee shot or replay their first shot from the tee. Many golfers wear golf shoes with metal or plastic spikes designed to increase traction, thus allowing for longer and more accurate shots. A golf bag
12880-482: The ball may "hook", "pull", "draw", "fade", "push" or "slice" off the intended line and land out of bounds or in the rough or hazards, and thus the player will require many more strokes to hole out. A golf stroke uses the muscles of the core (especially erector spinae muscles and latissimus dorsi muscle when turning), hamstring , shoulder , and wrist . Stronger muscles in the wrist can prevent them from being twisted during swings, whilst stronger shoulders increase
13041-413: The ball slightly above the ground up to a few centimetres high. Tees are commonly made of wood but may be constructed of any material, including plastic. Traditionally, golfers used mounds of sand to elevate the ball, and containers of sand were provided for the purpose. A few courses still require sand to be used instead of peg tees, to reduce litter and reduce damage to the teeing ground. Tees help reduce
13202-411: The barren rock is to be found in the so-called Dry Valleys of Antarctica that almost never get snow, which can have ice-encrusted saline lakes that suggest evaporation far greater than the rare snowfall due to the strong katabatic winds that even evaporate ice. Deserts, both hot and cold, play a part in moderating Earth's temperature, because they reflect more of the incoming light and their albedo
13363-457: The capture of large quantities of solar energy . English desert and its Romance cognates (including Italian and Portuguese deserto , French désert and Spanish desierto ) all come from the ecclesiastical Latin dēsertum (originally "an abandoned place"), a participle of dēserere , "to abandon". The correlation between aridity and sparse population is complex and dynamic, varying by culture, era, and technologies; thus
13524-516: The cellular structure of which has been modified to allow them to store water. When rain falls, the water is rapidly absorbed by the shallow roots and retained to allow them to survive until the next downpour, which may be months or years away. The giant saguaro cacti of the Sonoran Desert form "forests", providing shade for other plants and nesting places for desert birds. Saguaro grows slowly but may live for up to two hundred years. The surface of
13685-615: The coldest part of the year. Animals adapted to live in deserts are called xerocoles . There is no evidence that body temperature of mammals and birds is adaptive to the different climates, either of great heat or cold. In fact, with a very few exceptions, their basal metabolic rate is determined by body size, irrespective of the climate in which they live. Many desert animals (and plants) show especially clear evolutionary adaptations for water conservation or heat tolerance and so are often studied in comparative physiology , ecophysiology , and evolutionary physiology . One well-studied example
13846-597: The collision between airborne particles and by the impacts of saltating sand grains landing on the ground. The mechanism is little understood but the particles usually have a negative charge when their diameter is under 250 μm and a positive one when they are over 500 μm. Deserts and semi-deserts are home to ecosystems with low or very low biomass and primary productivity in arid or semi-arid climates. They are mostly found in subtropical high-pressure belts and major continental rain shadows . Primary productivity depends on low densities of small photoautotrophs that sustain
14007-586: The color of the underlying surface. The desert lark takes frequent dust baths which ensures that it matches its environment. Water and carbon dioxide are metabolic end products of oxidation of fats, proteins, and carbohydrates. Oxidising a gram of carbohydrate produces 0.60 grams of water; a gram of protein produces 0.41 grams of water; and a gram of fat produces 1.07 grams of water, making it possible for xerocoles to live with little or no access to drinking water. The kangaroo rat for example makes use of this water of metabolism and conserves water both by having
14168-477: The committee may designate a maximum score possible for a hole for the same reasons, while formalizing the surrender or "pick-up" rule. The total distance from the first teeing ground to the 18th green can be quite long; total yardages "through the green" can be in excess of 7,000 yards (6,400 m), and when adding in the travel distance between the green of one hole and the tee of the next, even skilled players may easily travel 5 miles (8.0 km) or more during
14329-468: The concept of desert, without the characteristic of aridity, not lacking water, but instead lacking life. Such places can be so-called "ocean deserts", which are mostly at the centers of gyres , but also hypoxic or anoxic waters such as dead zones . Deserts usually have a large diurnal and seasonal temperature range, with high daytime temperatures falling sharply at night. The diurnal range may be as much as 20 to 30 °C (36 to 54 °F) and
14490-503: The desert floor to scarify the seed coat. The seed of the mesquite tree, which grows in deserts in the Americas, is hard and fails to sprout even when planted carefully. When it has passed through the gut of a pronghorn it germinates readily, and the little pile of moist dung provides an excellent start to life well away from the parent tree. The stems and leaves of some plants lower the surface velocity of sand-carrying winds and protect
14651-500: The desert need special adaptations to survive in the harsh environment. Plants tend to be tough and wiry with small or no leaves, water-resistant cuticles , and often spines to deter herbivory . Some annual plants germinate , bloom and die in the course of a few weeks after rainfall, while other long-lived plants survive for years and have deep root systems able to tap underground moisture. Animals need to keep cool and find enough food and water to survive. Many are nocturnal , and stay in
14812-587: The driest season, and others curl their leaves up to reduce transpiration. Others, such as aloes , store water in succulent leaves or stems or in fleshy tubers. Desert plants maximize water uptake by having shallow roots that spread widely, or by developing long taproots that reach down to deep rock strata for ground water. The saltbush in Australia has succulent leaves and secretes salt crystals, enabling it to live in saline areas. In common with cacti, many have developed spines to ward off browsing animals. Some desert plants produce seed which lies dormant in
14973-455: The external temperature. Jerboas , desert rats , kangaroo rats and other small rodents emerge from their burrows at night and so do the foxes, coyotes, jackals and snakes that prey on them. Kangaroos keep cool by increasing their respiration rate, panting, sweating and moistening the skin of their forelegs with saliva . Mammals living in cold deserts have developed greater insulation through warmer body fur and insulating layers of fat beneath
15134-459: The first written record of golf is James II 's banning of the game in 1457, as an unwelcome distraction to learning archery. James IV lifted the ban in 1502 when he became a golfer himself, with golf clubs first recorded in 1503–1504: "For golf clubbes and balles to the King that he playit with". To many golfers, the Old Course at St Andrews , a links course dating to before 1574, is considered to be
15295-561: The form of springs , aquifers , underground rivers or lakes. Where these lie close to the surface, wells can be dug and oases may form where plant and animal life can flourish. The Nubian Sandstone Aquifer System under the Sahara Desert is the largest known accumulation of fossil water . The Great Man-Made River is a scheme launched by Libya's Muammar Gaddafi to tap this aquifer and supply water to coastal cities. Kharga Oasis in Egypt
15456-407: The formation of sand storms or dust storms . Wind-blown sand grains striking any solid object in their path can abrade the surface. Rocks are smoothed down, and the wind sorts sand into uniform deposits. The grains end up as level sheets of sand or are piled high in billowing sand dunes . Other deserts are flat, stony plains where all the fine material has been blown away and the surface consists of
15617-458: The fragmentation of harder granites , limestone and sandstone . There is a certain critical size (about 0.5 mm) below which further temperature-induced weathering of rocks does not occur and this provides a minimum size for sand grains. As the mountains are eroded, more and more sand is created. At high wind speeds, sand grains are picked up off the surface and blown along, a process known as saltation . The whirling airborne grains act as
15778-415: The fringe with the pin (normally a flagstick) and cup. The levels of grass are varied to increase difficulty, or to allow for putting in the case of the green. While many holes are designed with a direct line-of-sight from the teeing area to the green, some holes may bend either to the left or to the right. This is commonly called a "dogleg", in reference to a dog's knee. The hole is called a "dogleg left" if
15939-560: The game's ancient origins are unclear and much debated. Some historians trace the sport back to the Roman game of paganica , in which participants used a bent stick to hit a stuffed leather ball. One theory asserts that paganica spread throughout Europe as the Romans conquered most of the continent, during the first century BC, and eventually evolved into the modern game. Others cite chuiwan (捶丸; "chui" means striking and "wan" means small ball) as
16100-439: The ground from erosion. Even small fungi and microscopic plant organisms found on the soil surface (so-called cryptobiotic soil ) can be a vital link in preventing erosion and providing support for other living organisms. Cold deserts often have high concentrations of salt in the soil. Grasses and low shrubs are the dominant vegetation here and the ground may be covered with lichens . Most shrubs have spiny leaves and shed them in
16261-474: The ground have a marked effect on the degree of aridity and the plant and animal life that can be sustained. Rain falling in the cold season may be more effective at promoting plant growth, and defining the boundaries of deserts and the semiarid regions that surround them on the grounds of precipitation alone is problematic. A semi-arid desert or a steppe is a version of the arid desert with much more rainfall, vegetation and higher humidity. These regions feature
16422-432: The ground on its long legs, stopping periodically to snatch up insects. Like other desert birds, it is well-camouflaged by its coloring and can merge into the landscape when stationary. The sandgrouse is an expert at this and nests on the open desert floor dozens of kilometers (miles) away from the waterhole it needs to visit daily. Some small diurnal birds are found in very restricted localities where their plumage matches
16583-427: The ground rises quickly through a small pocket of cooler, low-pressure air above forming a whirling column of particles, a dust devil . Sandstorms occur with much less frequency than dust storms. They are often preceded by severe dust storms and occur when the wind velocity increases to a point where it can lift heavier particles. These grains of sand, up to about 0.5 mm (0.020 in) in diameter are jerked into
16744-429: The high desert floor, creating canyons that are over a mile (6,000 feet or 1,800 meters) deep in places, exposing strata that are over two billion years old. Sand and dust storms are natural events that occur in arid regions where the land is not protected by a covering of vegetation. Dust storms usually start in desert margins rather than the deserts themselves where the finer materials have already been blown away. As
16905-746: The high elevations of the Tabernas Desert (and some parts of the Spanish Plateu ), The Sahel , The Eurasian Steppe , most of Central Asia , the Western US , most of Northern Mexico , portions of South America (especially in Argentina ) and the Australian Outback . They usually feature BSh (hot steppe) or BSk (temperate steppe) in the Köppen climate classification . Coastal deserts are mostly found on
17066-439: The hole angles leftwards and "dogleg right" if it bends right. Sometimes, a hole's direction may bend twice; this is called a "double dogleg". A regular golf course consists of 18 holes, but nine-hole courses are common and can be played twice through for a full round of 18 holes. Early Scottish golf courses were primarily laid out on links land, soil-covered sand dunes directly inland from beaches. The word "links" derives from
17227-475: The hole" after enough strokes have been made by a player that it is mathematically impossible for the player to win the hole. It is also acceptable in informal stroke play to surrender the hole after hitting three strokes more than the "par" rating of the hole (a "triple bogey" – see below); while technically a violation of Rule 3–2, this practice speeds play as a courtesy to others, and avoids "runaway scores" and excessive frustration. Alternatively, in competition,
17388-494: The hole. The primary factor for classifying the par of a relatively straight, hazard-free hole is the distance from the tee to the green, and calculates the number of strokes a skilled golfer is expected to require to reach the green with an additional allowance of 2 putts. As such, the minimum par of any hole is 3; one stroke for the tee shot and two putts. Par 3, 4 and 5 holes are commonplace on golf courses; far more rarely, courses may feature par-6 and even par-7 holes. For men,
17549-450: The import of water from an outside source. Many trade routes have been forged across deserts, especially across the Sahara , and traditionally were used by caravans of camels carrying salt, gold, ivory and other goods. Large numbers of slaves were also taken northwards across the Sahara. Some mineral extraction also takes place in deserts, and the uninterrupted sunlight gives potential for
17710-492: The interference of the ground or grass on the movement of the club making the ball easier to hit by elevating the ball from the playing surface. When the initial shot on a hole is intended to move the ball a long distance, typically more than 225 yards (210 m), the shot is commonly called a "drive" and is generally made with a long-shafted, large-headed wood club called a "driver". Shorter holes may be initiated with other clubs, such as higher-numbered woods or irons . Once
17871-523: The lack of heat to aid in the evaporation process. Deserts are sometimes classified as "hot" or "cold", "semiarid" or "coastal". The characteristics of hot deserts include high temperatures in summer; greater evaporation than precipitation, usually exacerbated by high temperatures, strong winds and lack of cloud cover; considerable variation in the occurrence of precipitation, its intensity and distribution; and low humidity. Winter temperatures vary considerably between different deserts and are often related to
18032-479: The land with a billowing leading edge. The sunlight can be obliterated and it may become as dark as night at ground level. In a study of a dust storm in China in 2001, it was estimated that 6.5 million tons of dust were involved, covering an area of 134,000,000 km (52,000,000 sq mi). The mean particle size was 1.44 μm. A much smaller scale, short-lived phenomenon can occur in calm conditions when hot air near
18193-469: The land, deposits its water content and circulates back to sea. Further inland, areas receive very little precipitation. The Thar Desert near the India/Pakistan border is of this type. In some parts of the world, deserts are created by a rain shadow effect. Orographic lift occurs as air masses rise to pass over high ground. In the process they cool and lose much of their moisture by precipitation on
18354-692: The last ice age when the climate was colder and wetter. These include the Great Salt Lake , Utah Lake , Sevier Lake and many dry lake beds. The smooth flat surfaces of playas have been used for attempted vehicle speed records at Black Rock Desert and Bonneville Speedway and the United States Air Force uses Rogers Dry Lake in the Mojave Desert as runways for aircraft and the Space Shuttle . Deserts have been defined and classified in
18515-510: The life processes of plants. Potential evapotranspiration , then, is the amount of water that could evaporate in any given region. As an example, Tucson, Arizona receives about 300 mm (12 in) of rain per year, however about 2,500 mm (98 in) of water could evaporate over the course of a year. In other words, about eight times more water could evaporate from the region than actually falls as rain. Rates of evapotranspiration in cold regions such as Alaska are much lower because of
18676-412: The location of the desert on the continental landmass and the latitude. Daily variations in temperature can be as great as 22 °C (40 °F) or more, with heat loss by radiation at night being increased by the clear skies. Cold deserts, sometimes known as temperate deserts, occur at higher latitudes than hot deserts, and the aridity is caused by the dryness of the air. Some cold deserts are far from
18837-413: The match is continued until the party increases the lead by one hole or ties any of the remaining holes, thereby winning the match, or until the match ends in a tie with the lead player's opponent winning all remaining holes. When the game is tied after the predetermined number of holes have been played, it may be continued until one side takes a one-hole lead. The score achieved for each and every hole of
18998-404: The measurement of precipitation in providing a scientific measurement-based definition of a desert. The water budget of an area can be calculated using the formula P − PE ± S , wherein P is precipitation, PE is potential evapotranspiration rates and S is the amount of surface storage of water. Evapotranspiration is the combination of water loss through atmospheric evaporation and through
19159-475: The most successful player in the tournament's history, with 13 victories over four decades between 1956 and 1981. Bobby Locke won nine titles, Sid Brews won eight titles, and George Fotheringham won the event five times as did Ernie Els . In December 2018, the event became part of the Open Qualifying Series, giving up to three non-exempt players entry into The Open Championship . The 2021 event
19320-597: The nearest available sources of moisture. Montane deserts are arid places with a very high altitude ; the most prominent example is found north of the Himalayas, in the Kunlun Mountains and the Tibetan Plateau . Many locations within this category have elevations exceeding 3,000 m (9,800 ft) and the thermal regime can be hemiboreal . These places owe their profound aridity (the average annual precipitation
19481-409: The night to allow CO 2 to enter, and close them during the day, or by using C4 carbon fixation . Many desert plants have reduced the size of their leaves or abandoned them altogether. Cacti are present in both North and South America with a post-Gondwana origin. The genus is desert specialist, and in most species, the leaves have been dispensed with and the chlorophyll displaced into the trunks,
19642-583: The non-dominant side of the body facing the target (for a right-hander, the target is to their left). Setting the stance in regard to the position of the ball, and placing the clubhead behind the ball, is known as being at address; when in this position the player's body and the centerline of the club face are positioned parallel to the desired line of travel, with the feet either perpendicular to that line or slightly splayed outward. The feet are commonly shoulder-width apart for middle irons and putters, narrower for short irons and wider for long irons and woods. The ball
19803-514: The ocean and others are separated by mountain ranges from the sea, and in both cases, there is insufficient moisture in the air to cause much precipitation. The largest of these deserts are found in Central Asia. Others occur on the eastern side of the Rocky Mountains , the eastern side of the southern Andes and in southern Australia. Polar deserts are a particular class of cold desert. The air
19964-426: The outer surfaces of rocks split off in flat flakes. This is believed to be caused by the stresses put on the rock by repeated thermal expansions and contractions which induces fracturing parallel to the original surface. Chemical weathering processes probably play a more important role in deserts than was previously thought. The necessary moisture may be present in the form of dew or mist. Ground water may be drawn to
20125-507: The par calculation criteria, is called making "green in regulation" or GIR. Missing a GIR does not necessarily mean a golfer will not make par, but it does make doing so more difficult as it reduces the number of putts available; conversely, making a GIR does not guarantee a par, as the player might require three or more putts to "hole out". Professional golfers typically make between 60% and 70% of greens in regulation. Eighteen-hole courses typically total to an overall par score of 70 to 72 for
20286-466: The pavement is formed. It may be that after the sand and dust is blown away by the wind the stones jiggle themselves into place; alternatively, stones previously below ground may in some way work themselves to the surface. Very little further erosion takes place after the formation of a pavement, and the ground becomes stable. Evaporation brings moisture to the surface by capillary action and calcium salts may be precipitated, binding particles together to form
20447-426: The professional and top amateur level, as well as at high-level private clubs, players may be accompanied by caddies , who carry and manage the players' equipment and who are allowed by the rules to give advice on the play of the course. The rules of golf are internationally standardised and are jointly governed by The R&A , spun off in 2004 from The Royal and Ancient Golf Club of St Andrews (founded 1754), and
20608-564: The progenitor, a Chinese game played between the eighth and fourteenth centuries. A Ming Dynasty scroll by the artist Youqiu dating back to 1368 entitled "The Autumn Banquet" shows a member of the Chinese Imperial court swinging what appears to be a golf club at a small ball with the aim of sinking it into a hole. The game is thought to have been introduced into Europe during the Middle Ages. Another early game that resembled modern golf
20769-447: The putter. Anchored putting, a style that requires a longer putter shaft that can be anchored into the player's stomach or below the chin; the idea is to stabilize one end of the putter thus creating a more consistent pendulum stroke. This style has been banned on professional circuits since 2016. A hole is classified by its par, which gives an indication of the number of strokes a skilled golfer may be expected to need to complete play of
20930-438: The rock surface experiences even greater temperature differentials. During the day the sky is usually clear and most of the sun 's radiation reaches the ground, but as soon as the sun sets, the desert cools quickly by radiating heat into space. In hot deserts, the temperature during daytime can exceed 45 °C (113 °F) in summer and plunge below freezing point at night during winter. Such large temperature variations have
21091-423: The round or tournament is added to produce the total score, and the player with the lowest score wins in stroke play . Stroke play is the game most commonly played by professional golfers. If there is a tie after the regulation number of holes in a professional tournament, a playoff takes place between all tied players. Playoffs either are sudden death or employ a pre-determined number of holes, anywhere from three to
21252-503: The sand stream can rise as the largest sand grains do not become airborne at all. They are transported by creep, being rolled along the desert floor or performing short jumps. During a sandstorm, the wind-blown sand particles become electrically charged . Such electric fields , which range in size up to 80 kV/m, can produce sparks and cause interference with telecommunications equipment. They are also unpleasant for humans and can cause headaches and nausea. The electric fields are caused by
21413-435: The shade or underground during the heat of the day. They tend to be efficient at conserving water, extracting most of their needs from their food and concentrating their urine . Some animals remain in a state of dormancy for long periods, ready to become active again during the rare rainfall. They then reproduce rapidly while conditions are favorable before returning to dormancy. People have struggled to live in deserts and
21574-441: The sheet consists of thin horizontal layers of coarse silt and very fine to medium grain sand, separated by layers of coarse sand and pea-gravel which are a single grain thick. These larger particles anchor the other particles in place and may also be packed together on the surface so as to form a miniature desert pavement. Small ripples form on the sand sheet when the wind exceeds 24 km/h (15 mph). They form perpendicular to
21735-412: The skin. The arctic weasel has a metabolic rate that is two or three times as high as would be expected for an animal of its size. Birds have avoided the problem of losing heat through their feet by not attempting to maintain them at the same temperature as the rest of their bodies, a form of adaptive insulation. The emperor penguin has dense plumage, a downy under layer, an air insulation layer next to
21896-466: The soil until sparked into growth by rainfall. With annuals , such plants grow with great rapidity and may flower and set seed within weeks, aiming to complete their development before the last vestige of water dries up. For perennial plants, reproduction is more likely to be successful if the seed germinates in a shaded position, but not so close to the parent plant as to be in competition with it. Some seed will not germinate until it has been blown about on
22057-464: The sparse vegetation cover and the activities of large mammals and people. Plants and animals in deserts are mostly adapted to extreme and prolonged water deficits , but their reproductive phenology often responds to short episodes of surplus. Competitive interactions are weak. Plants face severe challenges in arid environments. Problems they need to solve include how to obtain enough water, how to avoid being eaten and how to reproduce. Photosynthesis
22218-413: The stance, while a few mid- and short-iron shots are made with the ball slightly behind the centre of the stance to ensure consistent contact between the ball and clubface, so the ball is on its way before the club continues down into the turf. The golfer chooses a golf club, grip, and stroke appropriate to the distance: Having chosen a club and stroke to produce the desired distance, the player addresses
22379-440: The surface by evaporation and the formation of salt crystals may dislodge rock particles as sand or disintegrate rocks by exfoliation. Shallow caves are sometimes formed at the base of cliffs by this means. As the desert mountains decay, large areas of shattered rock and rubble occur. The process continues and the end products are either dust or sand. Dust is formed from solidified clay or volcanic deposits whereas sand results from
22540-464: The surface of the ground. Dunes are sometimes solitary, but they are more often grouped together in dune fields. When these are extensive, they are known as sand seas or ergs . The shape of the dune depends on the characteristics of the prevailing wind. Barchan dunes are produced by strong winds blowing across a level surface and are crescent-shaped with the concave side away from the wind. When there are two directions from which winds regularly blow,
22701-561: The surrounding mountains. Former desert areas presently in non-arid environments, such as the Sandhills in Nebraska , are known as paleodeserts. In the Köppen climate classification system, deserts are classed as BWh (hot desert) or BWk (temperate desert). In the Thornthwaite climate classification system , deserts would be classified as arid megathermal climates. Polar deserts are
22862-597: The surrounding semi-arid lands for millennia. Nomads have moved their flocks and herds to wherever grazing is available, and oases have provided opportunities for a more settled way of life. The cultivation of semi-arid regions encourages erosion of soil and is one of the causes of increased desertification. Desert farming is possible with the aid of irrigation , and the Imperial Valley in California provides an example of how previously barren land can be made productive by
23023-399: The tallest type of dune. Rounded mounds of sand without a slip face are the rare dome dunes, found on the upwind edges of sand seas. In deserts where large amounts of limestone mountains surround a closed basin , such as at White Sands National Park in south-central New Mexico , occasional storm runoff transports dissolved limestone and gypsum into a low-lying pan within the basin where
23184-400: The tee and the green, such as the fairway, rough (tall grass), and various hazards that may be water, rocks, or sand-filled bunkers . Each hole on a course is unique in its specific layout. Many golf courses are designed to resemble their native landscape, such as along a sea coast (where the course is called a links ), within a forest, among rolling hills, or part of a desert . Golf
23345-541: The tournament, the South African Open regained its flagship event status for the first time since the January 2020 event. Source: 25°20′21″S 27°06′23″E / 25.339275°S 27.106319°E / -25.339275; 27.106319 Golf Golf is a club-and-ball sport in which players use various clubs to hit a ball into a series of holes on a course in as few strokes as possible. Golf, unlike most ball games , cannot and does not use
23506-407: The trunk is folded like a concertina , allowing it to expand, and a large specimen can hold eight tons of water after a good downpour. Other xerophytic plants have developed similar strategies by a process known as convergent evolution . They limit water loss by reducing the size and number of stomata, by having waxy coatings and hairy or tiny leaves. Some are deciduous, shedding their leaves in
23667-408: The turning force. Weak wrists can also transmit the force to elbows and even neck and lead to injury. (When a muscle contracts, it pulls equally from both ends and, to have movement at only one end of the muscle, other muscles must come into play to stabilize the bone to which the other end of the muscle is attached.) Golf is a unilateral exercise that can break body balances, requiring exercises to keep
23828-614: The unprotected surface of the ground to denudation . About one-third of the land surface of the Earth is arid or semi-arid . This includes much of the polar regions , where little precipitation occurs, and which are sometimes called polar deserts or "cold deserts". Deserts can be classified by the amount of precipitation that falls, by the temperature that prevails, by the causes of desertification or by their geographical location. Deserts are formed by weathering processes as large variations in temperature between day and night put strains on
23989-496: The use of the word desert can cause confusion. In English before the 20th century, desert was often used in the sense of "unpopulated area", without specific reference to aridity ; but today the word is most often used in its climate-science sense (an area of low precipitation). Phrases such as " desert island " and " Great American Desert ", or Shakespeare 's "deserts of Bohemia " ( The Winter's Tale ) in previous centuries did not necessarily imply sand or aridity; their focus
24150-416: The water evaporates, depositing the gypsum and forming crystals known as selenite . The crystals left behind by this process are eroded by the wind and deposited as vast white dune fields that resemble snow-covered landscapes. These types of dune are rare, and only form in closed arid basins that retain the highly soluble gypsum that would otherwise be washed into the sea. A large part of the surface area of
24311-476: The western edges of continental land masses in regions where cold currents approach the land or cold water upwellings rise from the ocean depths. The cool winds crossing this water pick up little moisture and the coastal regions have low temperatures and very low rainfall, the main precipitation being in the form of fog and dew. The range of temperatures on a daily and annual scale is relatively low, being 11 °C (20 °F) and 5 °C (9 °F) respectively in
24472-404: The wind blows, saltation and creep take place on the windward side of the dune and individual grains of sand move uphill. When they reach the crest, they cascade down the far side. The upwind slope typically has a gradient of 10° to 20° while the lee slope is around 32°, the angle at which loose dry sand will slip. As this wind-induced movement of sand grains takes place, the dune moves slowly across
24633-511: The wind direction and gradually move across the surface as the wind continues to blow. The distance between their crests corresponds to the average length of jumps made by particles during saltation. The ripples are ephemeral and a change in wind direction causes them to reorganise. Sand dunes are accumulations of windblown sand piled up in mounds or ridges. They form downwind of copious sources of dry, loose sand and occur when topographic and climatic conditions cause airborne particles to settle. As
24794-544: The winner. It was replaced as the flagship event for 2017 by the Alfred Dunhill Championship before regaining its status the following year. In 2020, the Alfred Dunhill Championship once again replaced the South African Open as the tour's flagship event. In 2021, the Alfred Dunhill Championship was scheduled to be the flagship event for the second consecutive year. However due to the cancellation of
24955-450: The world's deserts consists of flat, stone-covered plains dominated by wind erosion. In " eolian deflation ", the wind continually removes fine-grained material, which becomes wind-blown sand. This exposes coarser-grained material, mainly pebbles with some larger stones or cobbles , leaving a desert pavement , an area of land overlaid by closely packed smooth stones forming a tessellated mosaic. Different theories exist as to how exactly
25116-614: The world's oldest golf tournament, is The Open Championship , also known as The Open, which was first played in 1860 at the Prestwick Golf Club in Ayrshire, Scotland. This is one of the four major championships in men's professional golf, the other three being played in the United States: The Masters , the U.S. Open , and the PGA Championship . While the modern game of golf originated in 15th century Scotland ,
25277-470: The world, around 20% of desert is sand, varying from only 2% in North America to 30% in Australia and over 45% in Central Asia. Where sand does occur, it is usually in large quantities in the form of sand sheets or extensive areas of dunes . A sand sheet is a near-level, firm expanse of partially consolidated particles in a layer that varies from a few centimeters to a few meters thick. The structure of
25438-730: Was initially contested over just 36 holes until 1908, when it was extended to become a 72-hole tournament. Although non-whites had played in the South African Open before, most notably when Papwa Sewgolum finished second in 1963, it was not until 1972 that black golfers were allowed to compete. From 2011 until February 2020 it was held in the Johannesburg area; twice at Serengeti Golf Club , followed by five times at Glendower Golf Club , and then twice at Randpark Golf Club . In December 2020 it will move away from Johannesburg and be held at Gary Player Country Club in Sun City . Gary Player has been
25599-601: Was known as cambuca in England and chambot in France. The Persian game chowkan is another possible ancient origin, albeit being more polo -like. In addition, kolven (a game involving a ball and curved bats) was played annually in Loenen, Netherlands, beginning in 1297, to commemorate the capture of the assassin of Floris V , a year earlier. The modern game originated in Scotland , where
25760-635: Was scheduled to be a co-sanctioned event between the European Tour and the Sunshine Tour . However due to COVID-19 travel restrictions in place in the UK from South Africa, the event was revised as a sole-sanctioned Sunshine Tour event. From 1999 to 2016, the tournament was the Sunshine Tour's flagship event for the purposes of the Official World Golf Ranking , earning a minimum of 32 OWGR points for
25921-459: Was the sparse population. Deserts occupy about one third of Earth's land surface. Bottomlands may be salt -covered flats. Eolian processes are major factors in shaping desert landscapes. Polar deserts (also seen as "cold deserts") have similar features, except the main form of precipitation is snow rather than rain. Antarctica is the world's largest cold desert (composed of about 98% thick continental ice sheet and 2% barren rock). Some of
#703296